/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.feilong.lib.beanutils;

import java.beans.IndexedPropertyDescriptor;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.commons.beanutils.DynaBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.feilong.lib.beanutils.expression.DefaultResolver;
import com.feilong.lib.beanutils.expression.Resolver;

/**
 * Utility methods for using Java Reflection APIs to facilitate generic
 * property getter and setter operations on Java objects. Much of this
 * code was originally included in <code>BeanUtils</code>, but has been
 * separated because of the volume of code involved.
 * 
 * <p>
 * In general, the objects that are examined and modified using these
 * methods are expected to conform to the property getter and setter method
 * naming conventions described in the JavaBeans Specification (Version 1.0.1).
 * No data type conversions are performed, and there are no usage of any
 * <code>PropertyEditor</code> classes that have been registered, although
 * a convenient way to access the registered classes themselves is included.
 * 
 * <p>
 * For the purposes of this class, five formats for referencing a particular
 * property value of a bean are defined, with the <i>default</i> layout of an
 * identifying String in parentheses. However the notation for these formats
 * and how they are resolved is now (since BeanUtils 1.8.0) controlled by
 * the configured {@link Resolver} implementation:
 * 
 * <ul>
 * 
 * <li><strong>Simple (<code>name</code>)</strong> - The specified
 * <code>name</code> identifies an individual property of a particular
 * JavaBean. The name of the actual getter or setter method to be used
 * is determined using standard JavaBeans instrospection, so that (unless
 * overridden by a <code>BeanInfo</code> class, a property named "xyz"
 * will have a getter method named <code>getXyz()</code> or (for boolean
 * properties only) <code>isXyz()</code>, and a setter method named
 * <code>setXyz()</code>.</li>
 * 
 * <li><strong>Nested (<code>name1.name2.name3</code>)</strong> The first
 * name element is used to select a property getter, as for simple
 * references above. The object returned for this property is then
 * consulted, using the same approach, for a property getter for a
 * property named <code>name2</code>, and so on. The property value that
 * is ultimately retrieved or modified is the one identified by the
 * last name element.</li>
 * 
 * <li><strong>Indexed (<code>name[index]</code>)</strong> - The underlying
 * property value is assumed to be an array, or this JavaBean is assumed
 * to have indexed property getter and setter methods. The appropriate
 * (zero-relative) entry in the array is selected. <code>List</code>
 * objects are now also supported for read/write. You simply need to define
 * a getter that returns the <code>List</code></li>
 * <li><strong>Mapped (<code>name(key)</code>)</strong> - The JavaBean
 * is assumed to have an property getter and setter methods with an
 * additional attribute of type <code>java.lang.String</code>.</li>
 * <li><strong>Combined (<code>name1.name2[index].name3(key)</code>)</strong> -
 * Combining mapped, nested, and indexed references is also
 * supported.</li>
 * 
 * </ul>
 *
 * @version $Id$
 * @see Resolver
 * @see PropertyUtils
 * @since 1.7
 */
public class PropertyUtilsBean{

    /** The Constant log. */
    private static final Logger LOGGER   = LoggerFactory.getLogger(PropertyUtilsBean.class);

    //---------------------------------------------------------------

    private Resolver            resolver = new DefaultResolver();

    // --------------------------------------------------------- Class Methods

    /**
     * Return the PropertyUtils bean instance.
     * 
     * @return The PropertyUtils bean instance
     */
    protected static PropertyUtilsBean getInstance(){
        return BeanUtilsBean.getInstance().getPropertyUtils();
    }

    // --------------------------------------------------------- Variables

    /**
     * The cache of PropertyDescriptor arrays for beans we have already
     * introspected, keyed by the java.lang.Class of this object.
     */
    private WeakFastHashMap<Class<?>, BeanIntrospectionData> descriptorsCache       = null;

    private WeakFastHashMap<Class<?>, FastHashMap>           mappedDescriptorsCache = null;

    /** An empty object array */
    private static final Object[]                            EMPTY_OBJECT_ARRAY     = new Object[0];

    /** The list with BeanIntrospector objects. */
    private final List<BeanIntrospector>                     introspectors;

    // ---------------------------------------------------------- Constructors

    /** Base constructor */
    public PropertyUtilsBean(){
        descriptorsCache = new WeakFastHashMap<>();
        descriptorsCache.setFast(true);
        mappedDescriptorsCache = new WeakFastHashMap<>();
        mappedDescriptorsCache.setFast(true);
        introspectors = new CopyOnWriteArrayList<>();
        resetBeanIntrospectors();
    }

    // --------------------------------------------------------- Public Methods

    /**
     * Return the configured {@link Resolver} implementation used by BeanUtils.
     * <p>
     * The {@link Resolver} handles the <i>property name</i>
     * expressions and the implementation in use effectively
     * controls the dialect of the <i>expression language</i>
     * that BeanUtils recongnises.
     * <p>
     * {@link DefaultResolver} is the default implementation used.
     *
     * @return resolver The property expression resolver.
     * @since 1.8.0
     */
    public Resolver getResolver(){
        return resolver;
    }

    /**
     * Configure the {@link Resolver} implementation used by BeanUtils.
     * <p>
     * The {@link Resolver} handles the <i>property name</i>
     * expressions and the implementation in use effectively
     * controls the dialect of the <i>expression language</i>
     * that BeanUtils recongnises.
     * <p>
     * {@link DefaultResolver} is the default implementation used.
     *
     * @param resolver
     *            The property expression resolver.
     * @since 1.8.0
     */
    public void setResolver(final Resolver resolver){
        if (resolver == null){
            this.resolver = new DefaultResolver();
        }else{
            this.resolver = resolver;
        }
    }

    /**
     * Resets the {@link BeanIntrospector} objects registered at this instance. After this
     * method was called, only the default {@code BeanIntrospector} is registered.
     *
     * @since 1.9
     */
    public final void resetBeanIntrospectors(){
        introspectors.clear();
        introspectors.add(DefaultBeanIntrospector.INSTANCE);
        introspectors.add(SuppressPropertiesBeanIntrospector.SUPPRESS_CLASS);
    }

    /**
     * <p>
     * Copy property values from the "origin" bean to the "destination" bean
     * for all cases where the property names are the same (even though the
     * actual getter and setter methods might have been customized via
     * <code>BeanInfo</code> classes). No conversions are performed on the
     * actual property values -- it is assumed that the values retrieved from
     * the origin bean are assignment-compatible with the types expected by
     * the destination bean.
     * </p>
     *
     * <p>
     * If the origin "bean" is actually a <code>Map</code>, it is assumed
     * to contain String-valued <strong>simple</strong> property names as the keys, pointing
     * at the corresponding property values that will be set in the destination
     * bean.<strong>Note</strong> that this method is intended to perform
     * a "shallow copy" of the properties and so complex properties
     * (for example, nested ones) will not be copied.
     * </p>
     *
     * <p>
     * Note, that this method will not copy a List to a List, or an Object[]
     * to an Object[]. It's specifically for copying JavaBean properties.
     * </p>
     *
     * @param dest
     *            Destination bean whose properties are modified
     * @param orig
     *            Origin bean whose properties are retrieved
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if the <code>dest</code> or
     *             <code>orig</code> argument is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void copyProperties(final Object dest,final Object orig)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (dest == null){
            throw new IllegalArgumentException("No destination bean specified");
        }
        if (orig == null){
            throw new IllegalArgumentException("No origin bean specified");
        }

        if (orig instanceof DynaBean){
            final DynaProperty[] origDescriptors = ((DynaBean) orig).getDynaClass().getDynaProperties();
            for (DynaProperty origDescriptor : origDescriptors){
                final String name = origDescriptor.getName();
                if (isReadable(orig, name) && isWriteable(dest, name)){
                    try{
                        final Object value = ((DynaBean) orig).get(name);
                        if (dest instanceof DynaBean){
                            ((DynaBean) dest).set(name, value);
                        }else{
                            setSimpleProperty(dest, name, value);
                        }
                    }catch (final NoSuchMethodException e){
                        if (LOGGER.isDebugEnabled()){
                            LOGGER.debug("Error writing to '" + name + "' on class '" + dest.getClass() + "'", e);
                        }
                    }
                }
            }
        }else if (orig instanceof Map){
            final Iterator<?> entries = ((Map<?, ?>) orig).entrySet().iterator();
            while (entries.hasNext()){
                final Map.Entry<?, ?> entry = (Entry<?, ?>) entries.next();
                final String name = (String) entry.getKey();
                if (isWriteable(dest, name)){
                    try{
                        if (dest instanceof DynaBean){
                            ((DynaBean) dest).set(name, entry.getValue());
                        }else{
                            setSimpleProperty(dest, name, entry.getValue());
                        }
                    }catch (final NoSuchMethodException e){
                        if (LOGGER.isDebugEnabled()){
                            LOGGER.debug("Error writing to '" + name + "' on class '" + dest.getClass() + "'", e);
                        }
                    }
                }
            }
        }else /* if (orig is a standard JavaBean) */ {
            final PropertyDescriptor[] origDescriptors = getPropertyDescriptors(orig);
            for (PropertyDescriptor origDescriptor : origDescriptors){
                final String name = origDescriptor.getName();
                if (isReadable(orig, name) && isWriteable(dest, name)){
                    try{
                        final Object value = getSimpleProperty(orig, name);
                        if (dest instanceof DynaBean){
                            ((DynaBean) dest).set(name, value);
                        }else{
                            setSimpleProperty(dest, name, value);
                        }
                    }catch (final NoSuchMethodException e){
                        if (LOGGER.isDebugEnabled()){
                            LOGGER.debug("Error writing to '" + name + "' on class '" + dest.getClass() + "'", e);
                        }
                    }
                }
            }
        }

    }

    /**
     * <p>
     * Return the entire set of properties for which the specified bean
     * provides a read method. This map contains the unconverted property
     * values for all properties for which a read method is provided
     * (i.e. where the <code>getReadMethod()</code> returns non-null).
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not account for mapped properties.
     * </p>
     *
     * @param bean
     *            Bean whose properties are to be extracted
     * @return The set of properties for the bean
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Map<String, Object> describe(final Object bean) throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        final Map<String, Object> description = new HashMap<>();
        if (bean instanceof DynaBean){
            final DynaProperty[] descriptors = ((DynaBean) bean).getDynaClass().getDynaProperties();
            for (DynaProperty descriptor : descriptors){
                final String name = descriptor.getName();
                description.put(name, getProperty(bean, name));
            }
        }else{
            final PropertyDescriptor[] descriptors = getPropertyDescriptors(bean);
            for (PropertyDescriptor descriptor : descriptors){
                final String name = descriptor.getName();
                if (descriptor.getReadMethod() != null){
                    description.put(name, getProperty(bean, name));
                }
            }
        }
        return (description);

    }

    /**
     * Return the value of the specified indexed property of the specified
     * bean, with no type conversions. The zero-relative index of the
     * required value must be included (in square brackets) as a suffix to
     * the property name, or <code>IllegalArgumentException</code> will be
     * thrown. In addition to supporting the JavaBeans specification, this
     * method has been extended to support <code>List</code> objects as well.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            <code>propertyname[index]</code> of the property value
     *            to be extracted
     * @return the indexed property value
     *
     * @throws IndexOutOfBoundsException
     *             if the specified index
     *             is outside the valid range for the underlying array or List
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getIndexedProperty(final Object bean,String name)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Identify the index of the requested individual property
        int index = -1;
        try{
            index = resolver.getIndex(name);
        }catch (final IllegalArgumentException e){
            throw new IllegalArgumentException(
                            "Invalid indexed property '" + name + "' on bean class '" + bean.getClass() + "' " + e.getMessage());
        }
        if (index < 0){
            throw new IllegalArgumentException("Invalid indexed property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Isolate the name
        name = resolver.getProperty(name);

        // Request the specified indexed property value
        return (getIndexedProperty(bean, name, index));

    }

    /**
     * Return the value of the specified indexed property of the specified
     * bean, with no type conversions. In addition to supporting the JavaBeans
     * specification, this method has been extended to support
     * <code>List</code> objects as well.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            Simple property name of the property value to be extracted
     * @param index
     *            Index of the property value to be extracted
     * @return the indexed property value
     *
     * @throws IndexOutOfBoundsException
     *             if the specified index
     *             is outside the valid range for the underlying property
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getIndexedProperty(final Object bean,final String name,final int index)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null || name.length() == 0){
            if (bean.getClass().isArray()){
                return Array.get(bean, index);
            }else if (bean instanceof List){
                return ((List<?>) bean).get(index);
            }
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
            }
            return (((DynaBean) bean).get(name, index));
        }

        // Retrieve the property descriptor for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Call the indexed getter method if there is one
        if (descriptor instanceof IndexedPropertyDescriptor){
            Method readMethod = ((IndexedPropertyDescriptor) descriptor).getIndexedReadMethod();
            readMethod = MethodUtils.getAccessibleMethod(bean.getClass(), readMethod);
            if (readMethod != null){
                final Object[] subscript = new Object[1];
                subscript[0] = new Integer(index);
                try{
                    return (invokeMethod(readMethod, bean, subscript));
                }catch (final InvocationTargetException e){
                    if (e.getTargetException() instanceof IndexOutOfBoundsException){
                        throw (IndexOutOfBoundsException) e.getTargetException();
                    }
                    throw e;
                }
            }
        }

        // Otherwise, the underlying property must be an array
        final Method readMethod = getReadMethod(bean.getClass(), descriptor);
        if (readMethod == null){
            throw new NoSuchMethodException("Property '" + name + "' has no " + "getter method on bean class '" + bean.getClass() + "'");
        }

        // Call the property getter and return the value
        final Object value = invokeMethod(readMethod, bean, EMPTY_OBJECT_ARRAY);
        if (!value.getClass().isArray()){
            if (!(value instanceof java.util.List)){
                throw new IllegalArgumentException("Property '" + name + "' is not indexed on bean class '" + bean.getClass() + "'");
            }
            //get the List's value
            return ((java.util.List<?>) value).get(index);
        }
        //get the array's value
        try{
            return (Array.get(value, index));
        }catch (final ArrayIndexOutOfBoundsException e){
            throw new ArrayIndexOutOfBoundsException(
                            "Index: " + index + ", Size: " + Array.getLength(value) + " for property '" + name + "'");
        }
    }

    /**
     * Return the value of the specified mapped property of the
     * specified bean, with no type conversions. The key of the
     * required value must be included (in brackets) as a suffix to
     * the property name, or <code>IllegalArgumentException</code> will be
     * thrown.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            <code>propertyname(key)</code> of the property value
     *            to be extracted
     * @return the mapped property value
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getMappedProperty(final Object bean,String name)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Identify the key of the requested individual property
        String key = null;
        try{
            key = resolver.getKey(name);
        }catch (final IllegalArgumentException e){
            throw new IllegalArgumentException(
                            "Invalid mapped property '" + name + "' on bean class '" + bean.getClass() + "' " + e.getMessage());
        }
        if (key == null){
            throw new IllegalArgumentException("Invalid mapped property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Isolate the name
        name = resolver.getProperty(name);

        // Request the specified indexed property value
        return (getMappedProperty(bean, name, key));

    }

    /**
     * Return the value of the specified mapped property of the specified
     * bean, with no type conversions.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            Mapped property name of the property value to be extracted
     * @param key
     *            Key of the property value to be extracted
     * @return the mapped property value
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getMappedProperty(final Object bean,final String name,final String key)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }
        if (key == null){
            throw new IllegalArgumentException("No key specified for property '" + name + "' on bean class " + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "'+ on bean class '" + bean.getClass() + "'");
            }
            return (((DynaBean) bean).get(name, key));
        }

        Object result = null;

        // Retrieve the property descriptor for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "'+ on bean class '" + bean.getClass() + "'");
        }

        if (descriptor instanceof MappedPropertyDescriptor){
            // Call the keyed getter method if there is one
            Method readMethod = ((MappedPropertyDescriptor) descriptor).getMappedReadMethod();
            readMethod = MethodUtils.getAccessibleMethod(bean.getClass(), readMethod);
            if (readMethod != null){
                final Object[] keyArray = new Object[1];
                keyArray[0] = key;
                result = invokeMethod(readMethod, bean, keyArray);
            }else{
                throw new NoSuchMethodException(
                                "Property '" + name + "' has no mapped getter method on bean class '" + bean.getClass() + "'");
            }
        }else{
            /* means that the result has to be retrieved from a map */
            final Method readMethod = getReadMethod(bean.getClass(), descriptor);
            if (readMethod != null){
                final Object invokeResult = invokeMethod(readMethod, bean, EMPTY_OBJECT_ARRAY);
                /* test and fetch from the map */
                if (invokeResult instanceof java.util.Map){
                    result = ((java.util.Map<?, ?>) invokeResult).get(key);
                }
            }else{
                throw new NoSuchMethodException(
                                "Property '" + name + "' has no mapped getter method on bean class '" + bean.getClass() + "'");
            }
        }
        return result;

    }

    /**
     * <p>
     * Return the mapped property descriptors for this bean class.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param beanClass
     *            Bean class to be introspected
     * @return the mapped property descriptors
     * @deprecated This method should not be exposed
     */
    @Deprecated
    public FastHashMap getMappedPropertyDescriptors(final Class<?> beanClass){

        if (beanClass == null){
            return null;
        }

        // Look up any cached descriptors for this bean class
        return mappedDescriptorsCache.get(beanClass);

    }

    /**
     * <p>
     * Return the mapped property descriptors for this bean.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param bean
     *            Bean to be introspected
     * @return the mapped property descriptors
     * @deprecated This method should not be exposed
     */
    @Deprecated
    private FastHashMap getMappedPropertyDescriptors(final Object bean){
        if (bean == null){
            return null;
        }
        return (getMappedPropertyDescriptors(bean.getClass()));
    }

    /**
     * This method is called by getNestedProperty and setNestedProperty to
     * define what it means to get a property from an object which implements
     * Map. See setPropertyOfMapBean for more information.
     *
     * @param bean
     *            Map bean
     * @param propertyName
     *            The property name
     * @return the property value
     *
     * @throws IllegalArgumentException
     *             when the propertyName is regarded as
     *             being invalid.
     *
     * @throws IllegalAccessException
     *             just in case subclasses override this
     *             method to try to access real getter methods and find permission is denied.
     *
     * @throws InvocationTargetException
     *             just in case subclasses override this
     *             method to try to access real getter methods, and find it throws an
     *             exception when invoked.
     *
     * @throws NoSuchMethodException
     *             just in case subclasses override this
     *             method to try to access real getter methods, and want to fail if
     *             no simple method is available.
     * @since 1.8.0
     */
    private Object getPropertyOfMapBean(final Map<?, ?> bean,String propertyName)
                    throws IllegalArgumentException,IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (resolver.isMapped(propertyName)){
            final String name = resolver.getProperty(propertyName);
            if (name == null || name.length() == 0){
                propertyName = resolver.getKey(propertyName);
            }
        }

        if (resolver.isIndexed(propertyName) || resolver.isMapped(propertyName)){
            throw new IllegalArgumentException(
                            "Indexed or mapped properties are not supported on" + " objects of type Map: " + propertyName);
        }

        return bean.get(propertyName);
    }

    /**
     * Return the value of the specified property of the specified bean,
     * no matter which property reference format is used, with no
     * type conversions.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            Possibly indexed and/or nested name of the property
     *            to be extracted
     * @return the property value
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getProperty(Object bean,String name) throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{
        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Resolve nested references
        while (resolver.hasNested(name)){
            final String next = resolver.next(name);
            Object nestedBean = null;
            if (bean instanceof Map){
                nestedBean = getPropertyOfMapBean((Map<?, ?>) bean, next);
            }else if (resolver.isMapped(next)){
                nestedBean = getMappedProperty(bean, next);
            }else if (resolver.isIndexed(next)){
                nestedBean = getIndexedProperty(bean, next);
            }else{
                nestedBean = getSimpleProperty(bean, next);
            }
            if (nestedBean == null){
                throw new NestedNullException("Null property value for '" + name + "' on bean class '" + bean.getClass() + "'");
            }
            bean = nestedBean;
            name = resolver.remove(name);
        }

        if (bean instanceof Map){
            return getPropertyOfMapBean((Map<?, ?>) bean, name);
        }else if (resolver.isMapped(name)){
            return getMappedProperty(bean, name);
        }else if (resolver.isIndexed(name)){
            return getIndexedProperty(bean, name);
        }else{
            return getSimpleProperty(bean, name);
        }
    }

    /**
     * <p>
     * Retrieve the property descriptor for the specified property of the
     * specified bean, or return <code>null</code> if there is no such
     * descriptor. This method resolves indexed and nested property
     * references in the same manner as other methods in this class, except
     * that if the last (or only) name element is indexed, the descriptor
     * for the last resolved property itself is returned.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * <p>
     * Note that for Java 8 and above, this method no longer return
     * IndexedPropertyDescriptor for {@link List}-typed properties, only for
     * properties typed as native array. (BEANUTILS-492).
     *
     * @param bean
     *            Bean for which a property descriptor is requested
     * @param name
     *            Possibly indexed and/or nested name of the property for
     *            which a property descriptor is requested
     * @return the property descriptor
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws IllegalArgumentException
     *             if a nested reference to a
     *             property returns null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public PropertyDescriptor getPropertyDescriptor(Object bean,String name)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{
        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Resolve nested references
        while (resolver.hasNested(name)){
            final String next = resolver.next(name);
            final Object nestedBean = getProperty(bean, next);
            if (nestedBean == null){
                throw new NestedNullException("Null property value for '" + next + "' on bean class '" + bean.getClass() + "'");
            }
            bean = nestedBean;
            name = resolver.remove(name);
        }

        // Remove any subscript from the final name value
        name = resolver.getProperty(name);

        // Look up and return this property from our cache
        // creating and adding it to the cache if not found.
        if (name == null){
            return (null);
        }

        final BeanIntrospectionData data = getIntrospectionData(bean.getClass());
        PropertyDescriptor result = data.getDescriptor(name);
        if (result != null){
            return result;
        }

        FastHashMap mappedDescriptors = getMappedPropertyDescriptors(bean);
        if (mappedDescriptors == null){
            mappedDescriptors = new FastHashMap();
            mappedDescriptors.setFast(true);
            mappedDescriptorsCache.put(bean.getClass(), mappedDescriptors);
        }
        result = (PropertyDescriptor) mappedDescriptors.get(name);
        if (result == null){
            // not found, try to create it
            try{
                result = new MappedPropertyDescriptor(name, bean.getClass());
            }catch (final IntrospectionException ie){
                /*
                 * Swallow IntrospectionException
                 * TODO: Why?
                 */
            }
            if (result != null){
                mappedDescriptors.put(name, result);
            }
        }

        return result;

    }

    /**
     * <p>
     * Retrieve the property descriptors for the specified class,
     * introspecting and caching them the first time a particular bean class
     * is encountered.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param beanClass
     *            Bean class for which property descriptors are requested
     * @return the property descriptors
     *
     * @throws IllegalArgumentException
     *             if <code>beanClass</code> is null
     */
    public PropertyDescriptor[] getPropertyDescriptors(final Class<?> beanClass){
        return getIntrospectionData(beanClass).getDescriptors();
    }

    /**
     * <p>
     * Retrieve the property descriptors for the specified bean,
     * introspecting and caching them the first time a particular bean class
     * is encountered.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param bean
     *            Bean for which property descriptors are requested
     * @return the property descriptors
     *
     * @throws IllegalArgumentException
     *             if <code>bean</code> is null
     */
    public PropertyDescriptor[] getPropertyDescriptors(final Object bean){
        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        return (getPropertyDescriptors(bean.getClass()));
    }

    /**
     * <p>
     * Return an accessible property getter method for this property,
     * if there is one; otherwise return <code>null</code>.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param descriptor
     *            Property descriptor to return a getter for
     * @return The read method
     */
    public Method getReadMethod(final PropertyDescriptor descriptor){
        return MethodUtils.getAccessibleMethod(descriptor.getReadMethod());
    }

    /**
     * <p>
     * Return an accessible property getter method for this property,
     * if there is one; otherwise return <code>null</code>.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param clazz
     *            The class of the read method will be invoked on
     * @param descriptor
     *            Property descriptor to return a getter for
     * @return The read method
     */
    static Method getReadMethod(final Class<?> clazz,final PropertyDescriptor descriptor){
        return MethodUtils.getAccessibleMethod(clazz, descriptor.getReadMethod());
    }

    /**
     * Return the value of the specified simple property of the specified
     * bean, with no type conversions.
     *
     * @param bean
     *            Bean whose property is to be extracted
     * @param name
     *            Name of the property to be extracted
     * @return The property value
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws IllegalArgumentException
     *             if the property name
     *             is nested or indexed
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public Object getSimpleProperty(final Object bean,final String name)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Validate the syntax of the property name
        if (resolver.hasNested(name)){
            throw new IllegalArgumentException(
                            "Nested property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }else if (resolver.isIndexed(name)){
            throw new IllegalArgumentException(
                            "Indexed property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }else if (resolver.isMapped(name)){
            throw new IllegalArgumentException(
                            "Mapped property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "' on dynaclass '" + ((DynaBean) bean).getDynaClass() + "'");
            }
            return (((DynaBean) bean).get(name));
        }

        // Retrieve the property getter method for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "' on class '" + bean.getClass() + "'");
        }
        return getSimpleProperty(bean, name, descriptor);

    }

    /**
     * 
     * @since 3.0.6
     */
    private static Object getSimpleProperty(final Object bean,final String name,final PropertyDescriptor descriptor)
                    throws NoSuchMethodException,IllegalAccessException,InvocationTargetException{
        final Method readMethod = getReadMethod(bean.getClass(), descriptor);
        if (readMethod == null){
            throw new NoSuchMethodException("Property '" + name + "' has no getter method in class '" + bean.getClass() + "'");
        }

        // Call the property getter and return the value
        return invokeMethod(readMethod, bean, EMPTY_OBJECT_ARRAY);
    }

    /**
     * <p>
     * Return an accessible property setter method for this property,
     * if there is one; otherwise return <code>null</code>.
     * </p>
     *
     * <p>
     * <em>Note:</em> This method does not work correctly with custom bean
     * introspection under certain circumstances. It may return {@code null}
     * even if a write method is defined for the property in question. Use
     * {@link #getWriteMethod(Class, PropertyDescriptor)} to be sure that the
     * correct result is returned.
     * </p>
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param descriptor
     *            Property descriptor to return a setter for
     * @return The write method
     */
    public Method getWriteMethod(final PropertyDescriptor descriptor){
        return (MethodUtils.getAccessibleMethod(descriptor.getWriteMethod()));
    }

    /**
     * <p>
     * Return an accessible property setter method for this property,
     * if there is one; otherwise return <code>null</code>.
     * </p>
     *
     * <p>
     * <strong>FIXME</strong> - Does not work with DynaBeans.
     * </p>
     *
     * @param clazz
     *            The class of the read method will be invoked on
     * @param descriptor
     *            Property descriptor to return a setter for
     * @return The write method
     * @since 1.9.1
     */
    private Method getWriteMethod(final Class<?> clazz,final PropertyDescriptor descriptor){
        final BeanIntrospectionData data = getIntrospectionData(clazz);
        return (MethodUtils.getAccessibleMethod(clazz, data.getWriteMethod(clazz, descriptor)));
    }

    /**
     * <p>
     * Return <code>true</code> if the specified property name identifies
     * a readable property on the specified bean; otherwise, return
     * <code>false</code>.
     *
     * @param bean
     *            Bean to be examined (may be a {@link DynaBean}
     * @param name
     *            Property name to be evaluated
     * @return <code>true</code> if the property is readable,
     *         otherwise <code>false</code>
     *
     * @throws IllegalArgumentException
     *             if <code>bean</code>
     *             or <code>name</code> is <code>null</code>
     *
     * @since BeanUtils 1.6
     */
    public boolean isReadable(Object bean,String name){

        // Validate method parameters
        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Resolve nested references
        while (resolver.hasNested(name)){
            final String next = resolver.next(name);
            Object nestedBean = null;
            try{
                nestedBean = getProperty(bean, next);
            }catch (final IllegalAccessException e){
                return false;
            }catch (final InvocationTargetException e){
                return false;
            }catch (final NoSuchMethodException e){
                return false;
            }
            if (nestedBean == null){
                throw new NestedNullException("Null property value for '" + next + "' on bean class '" + bean.getClass() + "'");
            }
            bean = nestedBean;
            name = resolver.remove(name);
        }

        // Remove any subscript from the final name value
        name = resolver.getProperty(name);

        // Treat WrapDynaBean as special case - may be a write-only property
        // (see Jira issue# BEANUTILS-61)
        if (bean instanceof WrapDynaBean){
            bean = ((WrapDynaBean) bean).getInstance();
        }

        // Return the requested result
        if (bean instanceof DynaBean){
            // All DynaBean properties are readable
            return (((DynaBean) bean).getDynaClass().getDynaProperty(name) != null);
        }
        try{
            final PropertyDescriptor desc = getPropertyDescriptor(bean, name);
            if (desc != null){
                Method readMethod = getReadMethod(bean.getClass(), desc);
                if (readMethod == null){
                    if (desc instanceof IndexedPropertyDescriptor){
                        readMethod = ((IndexedPropertyDescriptor) desc).getIndexedReadMethod();
                    }else if (desc instanceof MappedPropertyDescriptor){
                        readMethod = ((MappedPropertyDescriptor) desc).getMappedReadMethod();
                    }
                    readMethod = MethodUtils.getAccessibleMethod(bean.getClass(), readMethod);
                }
                return (readMethod != null);
            }
            return false;
        }catch (final IllegalAccessException e){
            return false;
        }catch (final InvocationTargetException e){
            return false;
        }catch (final NoSuchMethodException e){
            return false;
        }

    }

    /**
     * <p>
     * Return <code>true</code> if the specified property name identifies
     * a writeable property on the specified bean; otherwise, return
     * <code>false</code>.
     *
     * @param bean
     *            Bean to be examined (may be a {@link DynaBean}
     * @param name
     *            Property name to be evaluated
     * @return <code>true</code> if the property is writeable,
     *         otherwise <code>false</code>
     *
     * @throws IllegalArgumentException
     *             if <code>bean</code>
     *             or <code>name</code> is <code>null</code>
     *
     * @since BeanUtils 1.6
     */
    public boolean isWriteable(Object bean,String name){

        // Validate method parameters
        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Resolve nested references
        while (resolver.hasNested(name)){
            final String next = resolver.next(name);
            Object nestedBean = null;
            try{
                nestedBean = getProperty(bean, next);
            }catch (final IllegalAccessException e){
                return false;
            }catch (final InvocationTargetException e){
                return false;
            }catch (final NoSuchMethodException e){
                return false;
            }
            if (nestedBean == null){
                throw new NestedNullException("Null property value for '" + next + "' on bean class '" + bean.getClass() + "'");
            }
            bean = nestedBean;
            name = resolver.remove(name);
        }

        // Remove any subscript from the final name value
        name = resolver.getProperty(name);

        // Treat WrapDynaBean as special case - may be a read-only property
        // (see Jira issue# BEANUTILS-61)
        if (bean instanceof WrapDynaBean){
            bean = ((WrapDynaBean) bean).getInstance();
        }

        // Return the requested result
        if (bean instanceof DynaBean){
            // All DynaBean properties are writeable
            return (((DynaBean) bean).getDynaClass().getDynaProperty(name) != null);
        }
        try{
            final PropertyDescriptor desc = getPropertyDescriptor(bean, name);
            if (desc != null){
                Method writeMethod = getWriteMethod(bean.getClass(), desc);
                if (writeMethod == null){
                    if (desc instanceof IndexedPropertyDescriptor){
                        writeMethod = ((IndexedPropertyDescriptor) desc).getIndexedWriteMethod();
                    }else if (desc instanceof MappedPropertyDescriptor){
                        writeMethod = ((MappedPropertyDescriptor) desc).getMappedWriteMethod();
                    }
                    writeMethod = MethodUtils.getAccessibleMethod(bean.getClass(), writeMethod);
                }
                return (writeMethod != null);
            }
            return (false);
        }catch (final IllegalAccessException e){
            return (false);
        }catch (final InvocationTargetException e){
            return (false);
        }catch (final NoSuchMethodException e){
            return (false);
        }

    }

    /**
     * Set the value of the specified indexed property of the specified
     * bean, with no type conversions. The zero-relative index of the
     * required value must be included (in square brackets) as a suffix to
     * the property name, or <code>IllegalArgumentException</code> will be
     * thrown. In addition to supporting the JavaBeans specification, this
     * method has been extended to support <code>List</code> objects as well.
     *
     * @param bean
     *            Bean whose property is to be modified
     * @param name
     *            <code>propertyname[index]</code> of the property value
     *            to be modified
     * @param value
     *            Value to which the specified property element
     *            should be set
     *
     * @throws IndexOutOfBoundsException
     *             if the specified index
     *             is outside the valid range for the underlying property
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    private void setIndexedProperty(final Object bean,String name,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Identify the index of the requested individual property
        int index = -1;
        try{
            index = resolver.getIndex(name);
        }catch (final IllegalArgumentException e){
            throw new IllegalArgumentException("Invalid indexed property '" + name + "' on bean class '" + bean.getClass() + "'");
        }
        if (index < 0){
            throw new IllegalArgumentException("Invalid indexed property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Isolate the name
        name = resolver.getProperty(name);

        // Set the specified indexed property value
        setIndexedProperty(bean, name, index, value);

    }

    /**
     * Set the value of the specified indexed property of the specified
     * bean, with no type conversions. In addition to supporting the JavaBeans
     * specification, this method has been extended to support
     * <code>List</code> objects as well.
     *
     * @param bean
     *            Bean whose property is to be set
     * @param name
     *            Simple property name of the property value to be set
     * @param index
     *            Index of the property value to be set
     * @param value
     *            Value to which the indexed property element is to be set
     *
     * @throws IndexOutOfBoundsException
     *             if the specified index
     *             is outside the valid range for the underlying property
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void setIndexedProperty(final Object bean,final String name,final int index,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null || name.length() == 0){
            if (bean.getClass().isArray()){
                Array.set(bean, index, value);
                return;
            }else if (bean instanceof List){
                final List<Object> list = toObjectList(bean);
                list.set(index, value);
                return;
            }
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
            }
            ((DynaBean) bean).set(name, index, value);
            return;
        }

        // Retrieve the property descriptor for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Call the indexed setter method if there is one
        if (descriptor instanceof IndexedPropertyDescriptor){
            Method writeMethod = ((IndexedPropertyDescriptor) descriptor).getIndexedWriteMethod();
            writeMethod = MethodUtils.getAccessibleMethod(bean.getClass(), writeMethod);
            if (writeMethod != null){
                final Object[] subscript = new Object[2];
                subscript[0] = new Integer(index);
                subscript[1] = value;
                try{
                    if (LOGGER.isTraceEnabled()){
                        final String valueClassName = value == null ? "<null>" : value.getClass().getName();
                        LOGGER.trace(
                                        "setSimpleProperty: Invoking method " + writeMethod + " with index=" + index + ", value=" + value
                                                        + " (class " + valueClassName + ")");
                    }
                    invokeMethod(writeMethod, bean, subscript);
                }catch (final InvocationTargetException e){
                    if (e.getTargetException() instanceof IndexOutOfBoundsException){
                        throw (IndexOutOfBoundsException) e.getTargetException();
                    }
                    throw e;
                }
                return;
            }
        }

        // Otherwise, the underlying property must be an array or a list
        final Method readMethod = getReadMethod(bean.getClass(), descriptor);
        if (readMethod == null){
            throw new NoSuchMethodException("Property '" + name + "' has no getter method on bean class '" + bean.getClass() + "'");
        }

        // Call the property getter to get the array or list
        final Object array = invokeMethod(readMethod, bean, EMPTY_OBJECT_ARRAY);
        if (!array.getClass().isArray()){
            if (array instanceof List){
                // Modify the specified value in the List
                final List<Object> list = toObjectList(array);
                list.set(index, value);
            }else{
                throw new IllegalArgumentException("Property '" + name + "' is not indexed on bean class '" + bean.getClass() + "'");
            }
        }else{
            // Modify the specified value in the array
            Array.set(array, index, value);
        }

    }

    /**
     * Set the value of the specified mapped property of the
     * specified bean, with no type conversions. The key of the
     * value to set must be included (in brackets) as a suffix to
     * the property name, or <code>IllegalArgumentException</code> will be
     * thrown.
     *
     * @param bean
     *            Bean whose property is to be set
     * @param name
     *            <code>propertyname(key)</code> of the property value
     *            to be set
     * @param value
     *            The property value to be set
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    private void setMappedProperty(final Object bean,String name,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Identify the key of the requested individual property
        String key = null;
        try{
            key = resolver.getKey(name);
        }catch (final IllegalArgumentException e){
            throw new IllegalArgumentException("Invalid mapped property '" + name + "' on bean class '" + bean.getClass() + "'");
        }
        if (key == null){
            throw new IllegalArgumentException("Invalid mapped property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Isolate the name
        name = resolver.getProperty(name);

        // Request the specified indexed property value
        setMappedProperty(bean, name, key, value);

    }

    /**
     * Set the value of the specified mapped property of the specified
     * bean, with no type conversions.
     *
     * @param bean
     *            Bean whose property is to be set
     * @param name
     *            Mapped property name of the property value to be set
     * @param key
     *            Key of the property value to be set
     * @param value
     *            The property value to be set
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void setMappedProperty(final Object bean,final String name,final String key,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }
        if (key == null){
            throw new IllegalArgumentException("No key specified for property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
            }
            ((DynaBean) bean).set(name, key, value);
            return;
        }

        // Retrieve the property descriptor for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        if (descriptor instanceof MappedPropertyDescriptor){
            // Call the keyed setter method if there is one
            Method mappedWriteMethod = ((MappedPropertyDescriptor) descriptor).getMappedWriteMethod();
            mappedWriteMethod = MethodUtils.getAccessibleMethod(bean.getClass(), mappedWriteMethod);
            if (mappedWriteMethod != null){
                final Object[] params = new Object[2];
                params[0] = key;
                params[1] = value;
                if (LOGGER.isTraceEnabled()){
                    final String valueClassName = value == null ? "<null>" : value.getClass().getName();
                    LOGGER.trace(
                                    "setSimpleProperty: Invoking method " + mappedWriteMethod + " with key=" + key + ", value=" + value
                                                    + " (class " + valueClassName + ")");
                }
                invokeMethod(mappedWriteMethod, bean, params);
            }else{
                throw new NoSuchMethodException(
                                "Property '" + name + "' has no mapped setter method" + "on bean class '" + bean.getClass() + "'");
            }
        }else{
            /* means that the result has to be retrieved from a map */
            final Method readMethod = getReadMethod(bean.getClass(), descriptor);
            if (readMethod != null){
                final Object invokeResult = invokeMethod(readMethod, bean, EMPTY_OBJECT_ARRAY);
                /* test and fetch from the map */
                if (invokeResult instanceof java.util.Map){
                    final java.util.Map<String, Object> map = toPropertyMap(invokeResult);
                    map.put(key, value);
                }
            }else{
                throw new NoSuchMethodException(
                                "Property '" + name + "' has no mapped getter method on bean class '" + bean.getClass() + "'");
            }
        }

    }

    /**
     * Set the value of the (possibly nested) property of the specified
     * name, for the specified bean, with no type conversions.
     * <p>
     * Example values for parameter "name" are:
     * <ul>
     * <li>"a" -- sets the value of property a of the specified bean</li>
     * <li>"a.b" -- gets the value of property a of the specified bean,
     * then on that object sets the value of property b.</li>
     * <li>"a(key)" -- sets a value of mapped-property a on the specified
     * bean. This effectively means bean.setA("key").</li>
     * <li>"a[3]" -- sets a value of indexed-property a on the specified
     * bean. This effectively means bean.setA(3).</li>
     * </ul>
     *
     * @param bean
     *            Bean whose property is to be modified
     * @param name
     *            Possibly nested name of the property to be modified
     * @param value
     *            Value to which the property is to be set
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws IllegalArgumentException
     *             if a nested reference to a
     *             property returns null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void setNestedProperty(Object bean,String name,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Resolve nested references
        while (resolver.hasNested(name)){
            final String next = resolver.next(name);
            Object nestedBean = null;
            if (bean instanceof Map){
                nestedBean = getPropertyOfMapBean((Map<?, ?>) bean, next);
            }else if (resolver.isMapped(next)){
                nestedBean = getMappedProperty(bean, next);
            }else if (resolver.isIndexed(next)){
                nestedBean = getIndexedProperty(bean, next);
            }else{
                nestedBean = getSimpleProperty(bean, next);
            }
            if (nestedBean == null){
                throw new NestedNullException("Null property value for '" + name + "' on bean class '" + bean.getClass() + "'");
            }
            bean = nestedBean;
            name = resolver.remove(name);
        }

        if (bean instanceof Map){
            setPropertyOfMapBean(toPropertyMap(bean), name, value);
        }else if (resolver.isMapped(name)){
            setMappedProperty(bean, name, value);
        }else if (resolver.isIndexed(name)){
            setIndexedProperty(bean, name, value);
        }else{
            setSimpleProperty(bean, name, value);
        }

    }

    /**
     * This method is called by method setNestedProperty when the current bean
     * is found to be a Map object, and defines how to deal with setting
     * a property on a Map.
     * <p>
     * The standard implementation here is to:
     * <ul>
     * <li>call bean.set(propertyName) for all propertyName values.</li>
     * <li>throw an IllegalArgumentException if the property specifier
     * contains MAPPED_DELIM or INDEXED_DELIM, as Map entries are essentially
     * simple properties; mapping and indexing operations do not make sense
     * when accessing a map (even thought the returned object may be a Map
     * or an Array).</li>
     * </ul>
     * <p>
     * The default behaviour of beanutils 1.7.1 or later is for assigning to
     * "a.b" to mean a.put(b, obj) always. However the behaviour of beanutils
     * version 1.6.0, 1.6.1, 1.7.0 was for "a.b" to mean a.setB(obj) if such
     * a method existed, and a.put(b, obj) otherwise. In version 1.5 it meant
     * a.put(b, obj) always (ie the same as the behaviour in the current version).
     * In versions prior to 1.5 it meant a.setB(obj) always. [yes, this is
     * all <i>very</i> unfortunate]
     * <p>
     * Users who would like to customise the meaning of "a.b" in method
     * setNestedProperty when a is a Map can create a custom subclass of
     * this class and override this method to implement the behaviour of
     * their choice, such as restoring the pre-1.4 behaviour of this class
     * if they wish. When overriding this method, do not forget to deal
     * with MAPPED_DELIM and INDEXED_DELIM characters in the propertyName.
     * <p>
     * Note, however, that the recommended solution for objects that
     * implement Map but want their simple properties to come first is
     * for <i>those</i> objects to override their get/put methods to implement
     * that behaviour, and <i>not</i> to solve the problem by modifying the
     * default behaviour of the PropertyUtilsBean class by overriding this
     * method.
     *
     * @param bean
     *            Map bean
     * @param propertyName
     *            The property name
     * @param value
     *            the property value
     *
     * @throws IllegalArgumentException
     *             when the propertyName is regarded as
     *             being invalid.
     *
     * @throws IllegalAccessException
     *             just in case subclasses override this
     *             method to try to access real setter methods and find permission is denied.
     *
     * @throws InvocationTargetException
     *             just in case subclasses override this
     *             method to try to access real setter methods, and find it throws an
     *             exception when invoked.
     *
     * @throws NoSuchMethodException
     *             just in case subclasses override this
     *             method to try to access real setter methods, and want to fail if
     *             no simple method is available.
     * @since 1.8.0
     */
    protected void setPropertyOfMapBean(final Map<String, Object> bean,String propertyName,final Object value)
                    throws IllegalArgumentException,IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (resolver.isMapped(propertyName)){
            final String name = resolver.getProperty(propertyName);
            if (name == null || name.length() == 0){
                propertyName = resolver.getKey(propertyName);
            }
        }

        if (resolver.isIndexed(propertyName) || resolver.isMapped(propertyName)){
            throw new IllegalArgumentException(
                            "Indexed or mapped properties are not supported on" + " objects of type Map: " + propertyName);
        }

        bean.put(propertyName, value);
    }

    /**
     * Set the value of the specified property of the specified bean,
     * no matter which property reference format is used, with no
     * type conversions.
     *
     * @param bean
     *            Bean whose property is to be modified
     * @param name
     *            Possibly indexed and/or nested name of the property
     *            to be modified
     * @param value
     *            Value to which this property is to be set
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void setProperty(final Object bean,final String name,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{
        setNestedProperty(bean, name, value);
    }

    /**
     * Set the value of the specified simple property of the specified bean,
     * with no type conversions.
     *
     * @param bean
     *            Bean whose property is to be modified
     * @param name
     *            Name of the property to be modified
     * @param value
     *            Value to which the property should be set
     *
     * @throws IllegalAccessException
     *             if the caller does not have
     *             access to the property accessor method
     * @throws IllegalArgumentException
     *             if <code>bean</code> or
     *             <code>name</code> is null
     * @throws IllegalArgumentException
     *             if the property name is
     *             nested or indexed
     * @throws InvocationTargetException
     *             if the property accessor method
     *             throws an exception
     * @throws NoSuchMethodException
     *             if an accessor method for this
     *             propety cannot be found
     */
    public void setSimpleProperty(final Object bean,final String name,final Object value)
                    throws IllegalAccessException,InvocationTargetException,NoSuchMethodException{

        if (bean == null){
            throw new IllegalArgumentException("No bean specified");
        }
        if (name == null){
            throw new IllegalArgumentException("No name specified for bean class '" + bean.getClass() + "'");
        }

        // Validate the syntax of the property name
        if (resolver.hasNested(name)){
            throw new IllegalArgumentException(
                            "Nested property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }else if (resolver.isIndexed(name)){
            throw new IllegalArgumentException(
                            "Indexed property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }else if (resolver.isMapped(name)){
            throw new IllegalArgumentException(
                            "Mapped property names are not allowed: Property '" + name + "' on bean class '" + bean.getClass() + "'");
        }

        // Handle DynaBean instances specially
        if (bean instanceof DynaBean){
            final DynaProperty descriptor = ((DynaBean) bean).getDynaClass().getDynaProperty(name);
            if (descriptor == null){
                throw new NoSuchMethodException("Unknown property '" + name + "' on dynaclass '" + ((DynaBean) bean).getDynaClass() + "'");
            }
            ((DynaBean) bean).set(name, value);
            return;
        }

        // Retrieve the property setter method for the specified property
        final PropertyDescriptor descriptor = getPropertyDescriptor(bean, name);
        if (descriptor == null){
            throw new NoSuchMethodException("Unknown property '" + name + "' on class '" + bean.getClass() + "'");
        }
        final Method writeMethod = getWriteMethod(bean.getClass(), descriptor);
        if (writeMethod == null){
            throw new NoSuchMethodException("Property '" + name + "' has no setter method in class '" + bean.getClass() + "'");
        }

        // Call the property setter method
        final Object[] values = new Object[1];
        values[0] = value;
        if (LOGGER.isTraceEnabled()){
            final String valueClassName = value == null ? "<null>" : value.getClass().getName();
            LOGGER.trace("setSimpleProperty: Invoking method " + writeMethod + " with value " + value + " (class " + valueClassName + ")");
        }
        invokeMethod(writeMethod, bean, values);

    }

    /** This just catches and wraps IllegalArgumentException. */
    private static Object invokeMethod(final Method method,final Object bean,final Object[] values)
                    throws IllegalAccessException,InvocationTargetException{
        if (bean == null){
            throw new IllegalArgumentException("No bean specified " + "- this should have been checked before reaching this method");
        }

        try{
            return method.invoke(bean, values);
        }catch (final NullPointerException cause){
            // JDK 1.3 and JDK 1.4 throw NullPointerException if an argument is
            // null for a primitive value (JDK 1.5+ throw IllegalArgumentException)
            String valueString = "";
            if (values != null){
                for (int i = 0; i < values.length; i++){
                    if (i > 0){
                        valueString += ", ";
                    }
                    if (values[i] == null){
                        valueString += "<null>";
                    }else{
                        valueString += (values[i]).getClass().getName();
                    }
                }
            }
            String expectedString = "";
            final Class<?>[] parTypes = method.getParameterTypes();
            if (parTypes != null){
                for (int i = 0; i < parTypes.length; i++){
                    if (i > 0){
                        expectedString += ", ";
                    }
                    expectedString += parTypes[i].getName();
                }
            }
            throw new IllegalArgumentException(
                            "Cannot invoke " + method.getDeclaringClass().getName() + "." + method.getName() + " on bean class '"
                                            + bean.getClass() + "' - " + cause.getMessage()
                                            // as per https://issues.apache.org/jira/browse/BEANUTILS-224
                                            + " - had objects of type \"" + valueString + "\" but expected signature \"" + expectedString
                                            + "\"");
        }catch (final IllegalArgumentException cause){
            String valueString = "";
            if (values != null){
                for (int i = 0; i < values.length; i++){
                    if (i > 0){
                        valueString += ", ";
                    }
                    if (values[i] == null){
                        valueString += "<null>";
                    }else{
                        valueString += (values[i]).getClass().getName();
                    }
                }
            }
            String expectedString = "";
            final Class<?>[] parTypes = method.getParameterTypes();
            if (parTypes != null){
                for (int i = 0; i < parTypes.length; i++){
                    if (i > 0){
                        expectedString += ", ";
                    }
                    expectedString += parTypes[i].getName();
                }
            }
            throw new IllegalArgumentException(
                            "Cannot invoke " + method.getDeclaringClass().getName() + "." + method.getName() + " on bean class '"
                                            + bean.getClass() + "' - " + cause.getMessage()
                                            // as per https://issues.apache.org/jira/browse/BEANUTILS-224
                                            + " - had objects of type \"" + valueString + "\" but expected signature \"" + expectedString
                                            + "\"");

        }
    }

    /**
     * Obtains the {@code BeanIntrospectionData} object describing the specified bean
     * class. This object is looked up in the internal cache. If necessary, introspection
     * is performed now on the affected bean class, and the results object is created.
     *
     * @param beanClass
     *            the bean class in question
     * @return the {@code BeanIntrospectionData} object for this class
     * @throws IllegalArgumentException
     *             if the bean class is <b>null</b>
     */
    private BeanIntrospectionData getIntrospectionData(final Class<?> beanClass){
        if (beanClass == null){
            throw new IllegalArgumentException("No bean class specified");
        }

        // Look up any cached information for this bean class
        BeanIntrospectionData data = descriptorsCache.get(beanClass);
        if (data == null){
            data = fetchIntrospectionData(beanClass);
            descriptorsCache.put(beanClass, data);
        }

        return data;
    }

    /**
     * Performs introspection on the specified class. This method invokes all {@code BeanIntrospector} objects that were
     * added to this instance.
     *
     * @param beanClass
     *            the class to be inspected
     * @return a data object with the results of introspection
     */
    private BeanIntrospectionData fetchIntrospectionData(final Class<?> beanClass){
        final DefaultIntrospectionContext ictx = new DefaultIntrospectionContext(beanClass);

        for (final BeanIntrospector bi : introspectors){
            try{
                bi.introspect(ictx);
            }catch (final IntrospectionException iex){
                LOGGER.error("Exception during introspection", iex);
            }
        }

        return new BeanIntrospectionData(ictx.getPropertyDescriptors());
    }

    /**
     * Converts an object to a list of objects. This method is used when dealing
     * with indexed properties. It assumes that indexed properties are stored as
     * lists of objects.
     *
     * @param obj
     *            the object to be converted
     * @return the resulting list of objects
     */
    private static List<Object> toObjectList(final Object obj){
        // indexed properties are stored in lists of objects
        @SuppressWarnings("unchecked")
        final List<Object> list = (List<Object>) obj;
        return list;
    }

    /**
     * Converts an object to a map with property values. This method is used
     * when dealing with mapped properties. It assumes that mapped properties
     * are stored in a Map&lt;String, Object&gt;.
     *
     * @param obj
     *            the object to be converted
     * @return the resulting properties map
     */
    private static Map<String, Object> toPropertyMap(final Object obj){
        // mapped properties are stores in maps of type <String, Object>
        @SuppressWarnings("unchecked")
        final Map<String, Object> map = (Map<String, Object>) obj;
        return map;
    }
}
